3 ObjectivesProve certain triangles are similar by using AA, SSS, and SAS.Use triangle similarity to solve problems.

4 There are several ways to prove certain triangles are similarThere are several ways to prove certain triangles are similar. The following postulate, as well as the SSS and SAS Similarity Theorems, will be used in proofs just as SSS, SAS, ASA, HL, and AAS were used to prove triangles congruent.

22 You learned in Chapter 2 that the Reflexive, Symmetric, and Transitive Properties of Equality have corresponding properties of congruence. These properties also hold true for similarity of triangles.

23 Lesson Quiz1. Explain why the triangles are similar and write a similarity statement.2. Explain why the triangles are similar, then find BE and CD.